JP6861829B2 - Compressor - Google Patents

Description

The present invention relates to a compressor that compresses a working gas.

Conventionally, a scroll compressor has been known as one of the compressors used in refrigerators, air conditioners, and the like. The scroll compressor has a fixed scroll and an oscillating scroll, and the oscillating scroll performs a revolving turning motion with respect to the fixed scroll. The fixed scroll and the swing scroll are members in which a spiral wrap portion is formed on the surfaces facing each other, and a compression chamber is formed by both of the combined lap portions. Then, the scroll compressor changes the internal volume of the compression chamber by swinging the swing scroll, and compresses the working gas that has flowed into the compression chamber. A seal member called a tip seal is fitted on the tip surface of the spiral wrap portion in the fixed scroll and the swing scroll. The tip seal floats under back pressure during operation of the compressor, and fills the gap between the tip surface of the wrap portion and the base plate surface of the scroll on the other side to prevent leakage of working gas between adjacent compression chambers. It plays a function of preventing.

Patent Document 1 discloses a scroll compressor in which a notch is provided at a portion of the chip seal that interferes with the sub port to prevent the chip seal from interfering with the sub port and to prevent the chip seal from being worn due to being caught in the sub port. ..

Jitsukaisho 61-41882

The subport formed in the fixed scroll has a function of preventing the occurrence of power loss due to overcompression by discharging the working gas from the middle of the scroll when operating under the low compression ratio condition. In the compressor, the larger the diameter of the subport, the smaller the flow path resistance, and the greater the effect of reducing the power loss due to overcompression can be obtained. However, since the subport is provided at a position close to the chip seal provided on the swing scroll, if the diameter of the subport is made too large and the subport straddles the chip seal, it will be between adjacent compression chambers through the subport. It causes leakage of working gas. Therefore, it is necessary to design the diameter of the sub port as large as possible without straddling the chip seal.

The scroll compressor disclosed in Patent Document 1 does not have the effect of expanding the seal width by the chip seal, and the diameter of the sub port or the diameter of the injection port is changed from (wrap portion width / 2 + chip seal width / 2). Can't be big. Therefore, a sufficient flow path area cannot be secured for the subport, and the compressor may cause an overcompression loss. Further, the injection port cannot secure a sufficient flow path area, and the compressor may increase the discharge temperature due to insufficient injection flow rate.

The present invention has been made against the background of the above problems, and an object of the present invention is to provide a compressor that secures a large diameter of a sub port or a large diameter of an injection port even when a chip seal is used.

The compressor according to the present invention is formed on a fixed scroll having a fixed spiral base plate portion and a fixed spiral wrap portion formed on the fixed spiral base plate portion, and a swing spiral base plate portion and a swing spiral base plate portion. The fixed scroll has at least one subport for discharging the working gas, or at least one for injecting the working fluid of the liquid phase. An injection port is formed, the swing scroll is arranged along the spiral direction at the tip of the swing spiral wrap portion, and is provided with a tip seal in contact with the fixed spiral base plate portion of the fixed scroll facing the tip seal. The portion approaching the subport or injection port is arranged on the edge side with respect to the center in the width direction of the swing spiral wrap portion, and the portion approaching the subport or injection port is the portion of the swing spiral wrap portion. The first curved portion that passes through the edge side of the outer circumference with respect to the center in the width direction and the portion that approaches the sub port or the injection port are the end edges of the inner circumference with respect to the center in the width direction of the swing spiral wrap portion. possess a second curved portion through the side, a second curved portion are those that are formed by an involute curve having the same curvature as rocking spiral lap portion.

According to the present invention, in the chip seal, a portion approaching the sub port or the injection port is arranged on the edge portion side with respect to the center in the width direction of the spiral wrap portion. That is, the tip seal is arranged on the side away from the sub port or the injection port with respect to the center of the swinging spiral wrap portion. Therefore, in the compressor, the seal width by the chip seal can be secured larger than the case where the chip seal is configured in one involute shape and arranged in the center of the swing wrap portion, and the diameter of the sub port or the injection port can be increased. Can be designed large.

It is an axial sectional view which shows the compressor which concerns on Embodiment 1 of this invention. It is a horizontal sectional view which shows the rocking scroll, the fixed scroll, and the shape of a tip seal in the prior art. It is an enlarged view which shows the rocking scroll and the fixed scroll which the rocking scroll of FIG. 2 moved. It is a vertical sectional view which shows the relationship between the chip seal of FIG. 3 and a sub port or an injection port. It is a vertical sectional view of the compression part when the tip seal does not come into contact with a fixed scroll. FIG. 5 is an axial sectional view showing a swing scroll, a fixed scroll, and a shape of a chip seal in the compressor according to the first embodiment of the present invention. FIG. 5 is an axial sectional view showing a swing scroll, a fixed scroll, and a shape of a chip seal in the compressor according to the second embodiment of the present invention. FIG. 5 is an axial sectional view showing a swing scroll, a fixed scroll, and a shape of a chip seal in the compressor according to the third embodiment of the present invention. FIG. 5 is an axial sectional view showing a swing scroll, a fixed scroll, and a shape of a chip seal in the compressor according to the fourth embodiment of the present invention. FIG. 5 is an axial sectional view showing a swing scroll, a fixed scroll, and a shape of a chip seal in the compressor according to the fifth embodiment of the present invention.

Hereinafter, the compressor according to the embodiment of the present invention will be described with reference to the drawings and the like. In the following drawings including FIG. 1, the relative dimensional relationships and shapes of the constituent members may differ from the actual ones. Further, in the following drawings, those having the same reference numerals are the same or equivalent thereof, and this shall be common to the entire text of the specification. In addition, terms that indicate directions (for example, "top", "bottom", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding. For convenience of explanation, it is described as such, and does not limit the arrangement and orientation of the device or component.

Embodiment 1.
[Compressor 100]
FIG. 1 is an axial sectional view showing a compressor 100 according to a first embodiment of the present invention. The compressor 100 is a scroll compressor that sucks in and compresses the refrigerant that circulates in the refrigeration cycle, puts it in a high temperature and high pressure state, and discharges it. As shown in FIG. 1, the compressor 100 includes a shell 20, a motor 30, a compression unit 40, and a shaft unit 50. The compressor 100 is a low-pressure shell type compressor.

[Shell 20]
The shell 20 constitutes the outer shell of the compressor 100 and has pressure resistance. The shell 20 has a bottomed cylindrical shape, and has a lower shell 20a located at the bottom, a central shell 20b placed on the lower shell 20a and formed in a cylindrical shape, and an upper shell 20c that closes the upper part of the central shell 20b. Have. The shell 20 has an oil sump 21 at the bottom for storing oil. An oil pump 23 arranged in the oil sump 21 of the shell 20 is housed in the lower part of the shell 20. The oil pump 23 is attached to one end side of the shaft portion 50, and sucks the oil stored in the oil sump 21 of the shell 20 and supplies it to the oil supply passage 50a in the shaft portion 50. The oil supplied to the oil supply passage 50a is supplied to the bearing portion inside the compressor 100 and the old dam ring 41. This oil lubricates and cools the bearing portion and the old dam ring 41. A suction pipe 27 is provided on the side of the shell 20. The suction pipe 27 is a pipe that sucks the working gas into the shell 20. A discharge pipe 28 is provided on the upper part of the shell 20. The discharge pipe 28 is a pipe that discharges the working gas to the outside of the shell 20. The muffler 29 is provided above the fixed scroll 60, which will be described later, and suppresses the pulsation of the working gas discharged from the discharge port 65 and the sub port 62.

The frame 25 is provided inside the shell 20 above the motor 30 and is fixed to the shell 20. A swing scroll 70 and a fixed scroll 60 are mounted on the frame 25 in a state in which the spiral wrap portions are combined so as to mesh with each other. In the first embodiment, an example in which the fixed scroll 60 is fixed to the frame 25 will be described, but the fixed scroll 60 can be configured to be fixed to the shell 20 without being fixed to the frame 25. The frame 25 rotatably supports the shaft portion 50 via the main bearing 54. A suction port 25a is formed in the frame 25, and the working gas flows into the compression unit 40 through the suction port 25a. The subframe 26 is provided inside the shell 20 below the motor 30 and is fixed to the shell 20. The subframe 26 rotatably supports the shaft portion 50 via the auxiliary bearing 55.

The oil drain pipe 24 is a pipe that connects the space between the frame 25 and the swing scroll 70 and the space between the frame 25 and the subframe 26. The oil drain pipe 24 causes excess oil of the oil flowing in the space between the frame 25 and the swing scroll 70 to flow out into the space between the frame 25 and the subframe 26. The oil that has flowed into the space between the frame 25 and the subframe 26 passes through the subframe 26 and returns to the oil sump 21.

[Motor 30]
The motor 30 rotates the shaft portion 50. The motor 30 is provided inside the shell 20 and is installed between the frame 25 and the subframe 26. The motor 30 has a rotor 31 and a stator 32. The rotor 31 is provided on the inner peripheral side of the stator 32 and is attached to the shaft portion 50. The rotor 31 rotates the shaft portion 50 by rotating itself. The stator 32 is fixed to the shell 20 by shrink fitting or the like. The stator 32 generates a magnetic field by electric power supplied from an inverter (not shown) to rotate the rotor 31.

[Compression unit 40]
The compression unit 40 is provided inside the shell 20 and is driven by a motor 30 to compress the working gas. The compression unit 40 is housed in the frame 25 and has a fixed scroll 60 and a swing scroll 70. The fixed scroll 60 is fixed to the inside of the shell 20, and the fixed scroll 60 is formed with a discharge port 65 and a sub port 62 for discharging compressed working gas. The swing scroll 70 revolves around the fixed scroll 60, and the rotation movement is regulated by the old dam ring 41. The fixed scroll 60 and the swing scroll 70 have a spiral-shaped fixed spiral wrap portion 61 and a swing spiral wrap portion 71, which will be described later, formed on surfaces facing each other. The compression unit 40 forms a compression chamber in the space where the fixed spiral wrap portion 61 and the oscillating spiral wrap portion 71 mesh with each other. When the swing scroll 70 is swung by the rotation of the shaft portion 50, the compression unit 40 compresses the working gas in the compression chamber. The detailed configuration of the compression unit 40 will be described later.

The old dam ring 41 is an annular member attached to the swing scroll 70, and regulates the rotation motion of the swing scroll 70. The old dam ring 41 is attached to the old dam groove 41a formed on the lower surface of the thrust of the swing scroll 70. The slider 42 is a tubular member attached to the outer peripheral surface of the upper portion of the shaft portion 50, and is located on the inner surface of the lower portion of the swing scroll 70. That is, the swing scroll 70 is attached to the shaft portion 50 via the slider 42, and the swing scroll 70 also rotates as the shaft portion 50 rotates. A swing bearing 43 is provided between the swing scroll 70 and the slider 42. The sleeve 44 is a tubular member provided between the frame 25 and the main bearing 54, and is a member for absorbing the relative inclination of the main bearing 54 and the shaft portion 50.

[Shaft 50]
The shaft portion 50 is supported by the frame 25. The main bearing 54 provided between the shaft portion 50 and the frame 25 has a bearing structure made of, for example, a slide bearing made of a copper-lead alloy or the like, and the shaft portion 50 is rotatably supported. Although the case where the main bearing 54 is made of a slide bearing is illustrated, the shaft portion 50 may be pivotally supported by another known bearing structure. The shaft portion 50 has an oil supply passage 50a formed inside, and connects the motor 30 and the compression portion 40 to transmit the rotational force of the motor 30 to the compression portion 40.

A first balancer 52 is attached to the shaft portion 50. The first balancer 52 is located between the frame 25 and the rotor 31. The first balancer 52 cancels out the imbalance caused by the swing scroll 70 and the slider 42. The first balancer 52 is housed in the balancer cover 52a. Further, the second balancer 53 is attached to the shaft portion 50 via the rotor 31. The second balancer 53 is located between the rotor 31 and the subframe 26 and is attached to the lower surface of the rotor 31. The second balancer 53 cancels out the imbalance caused by the swing scroll 70 and the slider 42.

[Details of compression unit 40]
Next, the details of the compression unit 40 will be described in detail. As described above, the compression unit 40 has a fixed scroll 60 and a swing scroll 70. The fixed scroll 60 is fixed inside the shell 20, and the outer peripheral edge portion is placed on the upper part of the frame 25. The fixed scroll 60 has a fixed spiral base plate portion 64 and a fixed spiral wrap portion 61 formed on the fixed spiral base plate portion 64. A discharge port 65 and a sub port 62 are formed on the fixed spiral base plate portion 64 of the fixed scroll 60. The working gas compressed in the compression chamber is discharged through the discharge port 65 and the sub port 62. Alternatively, the fixed scroll 60 may be formed with an injection port 63 instead of the subport 62. Intermediate pressure working gas discharged from the compressor 100 and passing through an injection circuit (not shown) is introduced into the compression chamber through the injection port 63. The oscillating scroll 70 has a oscillating spiral base plate portion 74 and a oscillating spiral wrap portion 71 formed on the oscillating spiral base plate portion 74.

The compressed gas is discharged from the sub port 62 under operating conditions where the compression ratio is small. Since the compressed gas passes through the subport 62 and is bypassed into the upper shell 20c before reaching the center of the compression chamber, the compressor 100 can reduce the power loss due to excessive compression.

The injection port 63 is used when injecting a liquid phase working fluid into the compression chamber during operation under conditions of a high compression ratio. The injection port 63 has a function of lowering the temperature of the discharged gas and preventing damage to the fixed scroll 60 and the swing scroll 70 due to thermal expansion.

FIG. 2 is a horizontal sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 80 in the prior art. FIG. 3 is an enlarged view showing the swing scroll 70 and the fixed scroll 60 to which the swing scroll 70 of FIG. 2 has moved. The positions of these horizontal cross sections correspond to the AA line portions in the compressor 100 of FIG. In the following drawings, the positions of the discharge port 65, the sub port 62, or the injection port 63 formed in the fixed spiral base plate portion 64 are also shown in the plan view of the compressor. Further, the subport 62a and the subport 62b described below are collectively referred to as the subport 62, and the injection port 63a and the injection port 63b are collectively referred to as the injection port 63. First, the configurations of the subport 62 and the injection port 63 common to the compressor 100 will be described with reference to FIGS. 2 and 3. As shown in FIGS. 2 and 3, in the fixed spiral base plate portion 64 of the fixed scroll 60, a subport 62a is formed in the compression chamber 40a on the outward surface side of the fixed scroll 60, and compression on the inward surface side of the fixed scroll 60 is formed. A subport 62b is formed in the chamber 40b. The sub port 62a and the sub port 62b are arranged at a position where the compression chamber 40a on the outward surface side of the fixed scroll and the compression chamber 40b on the inward surface side of the fixed scroll are paired. When the fixed scroll 60 is formed with the injection port 63 instead of the subport 62, the injection port 63 is formed in place of the subport 62 of FIGS. 2 and 3. In this case, in the fixed spiral base plate portion 64 of the fixed scroll 60, an injection port 63a is formed in the compression chamber 40a on the outward surface side of the fixed scroll 60, and the injection port 63b is formed in the compression chamber 40b on the inward surface side of the fixed scroll 60. Is formed. The injection port 63a and the injection port 63b are arranged at a position where the compression chamber 40a on the outward side of the fixed scroll and the compression chamber 40b on the inward side of the fixed scroll are paired. The number of subports 62 may be one, and a plurality of paired subports 62 may be provided. Similarly, the number of injection ports 63 may be one, and a plurality of paired injection ports 63 may be provided.

Next, the chip seal 80 will be described. A tip seal fitting groove 81 having the same shape as the tip seal 80 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 80 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 80 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll wrap portion 71. Further, the tip seal 80 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 80 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 100, so that the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 80 slides while being pressed against the swing spiral base plate portion 74 during the operation of the compressor 100, so that the gap between the fixed spiral wrap portion 61 and the swing spiral base plate portion 74 and the fixing are fixed. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 and the injection port 63 are provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and come close to the tip seal 80 provided on the lap tip surface of the rocking scroll 70. In order to ensure the sealing property of the chip seal 80, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 80.

Here, the dimensional restrictions when the sub port 62 or the injection port 63 is provided will be described. Since the sub port 62 or the injection port 63 is arranged at a position overlapping the tip seal 80 of the swing scroll 70, it is necessary to make the size so that the sub port 62 or the injection port 63 does not completely straddle the tip seal 80 of the swing scroll 70. There is. In FIG. 3, δ is the contact range between the chip seal 80 and the fixed scroll 60, and the seal width between the chip seal 80 and the fixed scroll 60. That is, the compression unit 40 needs to set the diameter of the sub port 62 or the injection port 63 in the fixed scroll 60 so as to satisfy the seal width δ> 0.

FIG. 4 is a vertical cross-sectional view showing the relationship between the tip seal 80 of FIG. 3 and the sub port 62 or the injection port 63. FIG. 5 is a vertical cross-sectional view of the compression portion 40 when the tip seal 80 does not come into contact with the fixed scroll 60. FIG. 4 is a vertical cross-sectional view of the compression portion 40 when the seal width δ of the chip seal 80 and the fixed scroll 60 is formed so that the seal width δ> 0. At this time, since the compression portion 40 has a seal width δ in which the tip seal 80 of the swing scroll 70 and the fixed spiral base plate portion 64 come into contact with each other, leakage from the high pressure chamber 46 to the low pressure chamber 45 does not occur. The upper limit of the seal width δ is the width γ of the chip seal 80. FIG. 5 is a vertical cross-sectional view of the compression portion 40 when the seal width δ of the chip seal 80 and the fixed scroll 60 is formed so that the seal width δ <0. At this time, since there is no seal width δ in which the tip seal 80 of the swing scroll 70 and the fixed spiral base plate portion 64 come into contact with each other, the high pressure chamber 46 and the low pressure chamber 45 communicate with each other through the sub port 62, and the high pressure chamber 46 communicates with each other. The working gas leaks to the low pressure chamber 45. Therefore, the diameter of the subport 62 or the injection port 63 can be increased only within a range satisfying δ> 0, and in order to increase the diameter of the subport 62 or the injection port 63, the tip seal 80 of the swing scroll 70 It is necessary to devise the shape.

FIG. 6 is an axial sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 82 in the compressor 100 according to the first embodiment of the present invention. A tip seal fitting groove 81 having the same shape as the tip seal 82 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 82 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 82 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll 60. Further, the tip seal 82 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 82 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 100, so that the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 82 slides while being pressed against the swinging spiral base plate portion 74 during the operation of the compressor 100, thereby fixing the gap between the fixed spiral lapping portion 61 and the swinging spiral base plate portion 74. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 or the injection port 63 is provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and approaches the tip seal 82 provided on the lap tip surface of the swing scroll 70. In order to ensure the sealing property of the chip seal 82, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 82.

As shown in FIG. 6, the chip seal 82 is composed of a plurality of curves having different curvatures, and has three curves, that is, a first curve portion 82a, a second curve portion 82b, and a third curve portion 82c. The parts are joined together to form an integral unit. In FIG. 6, the chip seal 82 is shown so as to have a cut in order to clearly indicate the boundary of the curve, but the chip seal 82 is an integral body without a cut. That is, in the chip seal 82, a plurality of curves having different curvatures are continuously formed. The tip seal 82 has a portion close to the sub port 62 or the injection port 63 on the outer peripheral edge portion 71b side and the inner peripheral edge portion 71c side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Have been placed.

The tip seal 82 has a first curved portion 82a in which a portion of the fixed scroll 60 that approaches the subport 62a on the outward surface side passes through the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Has. Alternatively, in the chip seal 82, the portion of the fixed scroll 60 that approaches the injection port 63a on the outward surface side passes through the outer peripheral edge portion 71b side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has a curved portion 82a. The first curved portion 82a is composed of an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The tip seal 82 has a second curved portion in which a portion of the fixed scroll 60 that approaches the subport 62b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has 82b. Alternatively, in the tip seal 82, the portion of the fixed scroll 60 that approaches the injection port 63b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has two curved portions 82b. The second curved portion 82b is composed of an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The boundary between the first curved portion 82a and the second curved portion 82b is connected by a third curved portion 82c formed into a smooth curve , for example, an involute curve having a radius of curvature larger than that of the swing scroll 70. In the compressor 100 according to the first embodiment, the chip seal 82 is composed of three curved portions, but the number of curved portions constituting the chip seal 82 is changed according to the number of subports 62 or injection ports 63. Needless to say, that is good. The shape of the tip seal 82 of the fixed scroll 60 is formed by an involute curve having the same curvature as the fixed spiral wrap portion 61 of the fixed scroll 60 as before, and the center 71a in the width direction of the fixed spiral wrap portion 61 of the fixed scroll 60. It may be arranged in.

As described above, in the chip seal 82 of the compressor 100, the portion approaching the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It is arranged on the edge portion 71c side of the inner circumference. That is, the portions of the chip seal 82 that approach the subport 62a on the outward surface side of the fixed scroll 60 and the subport 62b on the inward surface side of the fixed scroll 60 are separated from the subport 62 with respect to the center 71a of the swing spiral wrap portion 71, respectively. It is located on the side. Therefore, the compressor 100 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 82 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the subport 62. The diameter can be designed large.

Specifically, when the tip seal 82 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the sub port 62 is set to "(wrap portion). Width / 2) + (chip seal width / 2) ”must be the constraint value or less. On the other hand, in the compressor 100, the chip seal 82 is integrally formed by connecting the three curved portions of the first curved portion 82a, the second curved portion 82b, and the third curved portion 82c. Therefore, it is possible to increase the diameter of the sub port 62 beyond this constraint value.

Further, the injection port 63 can be similarly designed to be large for the compressor 100 in which the injection port 63 is provided instead of the sub port 62. In the compressor 100, the injection port 63a of the chip seal 82 and the portion approaching the injection port 63b are arranged on the side away from the injection port 63 with respect to the center 71a of the oscillating spiral wrap portion 71, respectively. Therefore, the compressor 100 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 82 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the injection port 63. Can be designed with a large diameter.

Specifically, when the tip seal 82 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the injection port 63 is set to "(wrap). The constraint value must be less than or equal to "part width / 2) + (chip seal width / 2)". In the compressor 100, the chip seal 82 is integrally formed by connecting the three curved portions of the first curved portion 82a, the second curved portion 82b, and the third curved portion 82c having the above configuration. Therefore, the diameter of the injection port 63 can be increased beyond this constraint value.

As a result, the resistance of the compressor 100 when the working gas is discharged from the sub port 62 is reduced, and the performance can be improved. Further, in the compressor 100, when the injection port 63 is formed instead of the sub port 62, the flow rate of the working fluid of the liquid phase to be injected increases, and the discharge temperature can be lowered more efficiently.

Further, for example, if a notch is provided in the chip seal as in the prior art, gas leaks from the notch to the adjacent compression chambers, which may greatly reduce the performance of the compressor. Further, stress concentration in the notch of the chip seal may reduce the strength of the chip seal. In the compressor 100, the chip seal 82 is arranged at a position away from the sub port 62 or the injection port 63, and the chip seal 82 is not provided with a notch. Therefore, in the compressor 100, gas leakage does not occur between the compression chambers, and the strength of the chip seal 82 does not decrease due to stress concentration.

Further, in the conventional compressor, the tip seal 80 is formed into a spiral shape with a hard resin, and the tip seal 80 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 are fixed to the swing spiral wrap portion 71, respectively. It is arranged at the center 71a of the tip surface of the spiral wrap portion 61. Therefore, in the conventional compressor, the tip seal 80 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 are attached alternately, which may cause an assembly failure. On the other hand, in the compressor 100, the chip seal 82 is integrally formed by connecting the three curved portions of the first curved portion 82a, the second curved portion 82b, and the third curved portion 82c having the above configuration. Has been done. In the compressor 100, when the tip seal 80 of the fixed scroll 60 is formed by an involute curve as in the conventional case and is arranged at the center 71a of the tip surface of the fixed spiral wrap portion 61, the tip seal 80 of the fixed scroll 60 and the swing scroll 70 The shape of the chip seal 82 is different. Therefore, the compressor 100 can prevent the tip seal 82 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 from being erroneously assembled alternately.

Further, since the chip seal 82 of the compressor 100 smoothly connects a plurality of curves to each other, it is possible to process the fitting groove of the chip seal 82 at once in the swing scroll 70 with a single stroke, which is excellent processing. Sex can be ensured.

Embodiment 2.
FIG. 7 is an axial sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 83 in the compressor 110 according to the second embodiment of the present invention. Parts having the same configuration as the compressor 100 of FIGS. 1 to 6 are designated by the same reference numerals, and the description thereof will be omitted. In the compressor 110, the configuration of the chip seal 83 is different only in the configuration of the chip seal 82 of the compressor 100, and the other configurations constituting the compressor 110 are the same as those of the compressor 100.

A tip seal fitting groove 81 having the same shape as the tip seal 83 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 83 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 83 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll 60. Further, the tip seal 83 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 83 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 110, whereby the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 83 slides while being pressed against the swinging spiral base plate portion 74 during the operation of the compressor 110, thereby fixing the gap between the fixed spiral lapping portion 61 and the swinging spiral base plate portion 74. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 or the injection port 63 is provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and approaches the tip seal 83 provided on the lap tip surface of the rocking scroll 70. In order to ensure the sealing property of the chip seal 83, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 83.

As shown in FIG. 7, in the compressor 110, the chip seal 83 is composed of a plurality of curves having different curvatures, and has two curved portions, a first curved portion 83a and a second curved portion 83b. It is connected and configured as one. In FIG. 7, the chip seal 83 is shown so as to have a break in order to clearly indicate the boundary between the curves, but the boundary between the two curves is not divided, and the chip seal 83 is an integral body without a break. is there. That is, in the chip seal 83, a plurality of curves having different curvatures are continuously formed. In the tip seal 83, the portion of the tip seal 83 that approaches the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the inner peripheral edge portion 71c side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Have been placed.

The tip seal 83 has a first curved portion 83a in which a portion of the fixed scroll 60 that approaches the subport 62a on the outward surface side passes through the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Has. Alternatively, in the chip seal 83, a portion where the portion of the fixed scroll 60 approaching the injection port 63a on the outward surface side passes through the outer peripheral edge portion 71b side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has a curved portion 83a. The first curved portion 83a is composed of an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The tip seal 83 is composed of an involute curve having a radius of curvature larger than that of the swing scroll 70, and has a second curved portion 83b that is arranged from the inside of the swing spiral wrap portion 71 as it approaches the center portion of the spiral. In the second curved portion 83b of the tip seal 83, the portion where the portion approaching the subport 62b on the inward surface side of the fixed scroll 60 is on the inner peripheral edge portion 71c side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Pass through. Alternatively, in the second curved portion 83b of the tip seal 83, the portion where the portion approaching the injection port 63b on the inward surface side of the fixed scroll 60 is the end edge of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It passes through the portion 71c side.

In the compressor 110 according to the second embodiment, the chip seal 83 is composed of two curved portions, but the number of curved portions constituting the chip seal 83 is changed according to the number of subports 62 or injection ports 63. Needless to say, that is good. The shape of the tip seal 83 of the fixed scroll 60 is formed by an involute curve having the same curvature as the fixed spiral wrap portion 61 of the fixed scroll 60 as before, and the center 71a in the width direction of the fixed spiral wrap portion 61 of the fixed scroll 60. It may be arranged in.

As described above, in the chip seal 83 of the compressor 110, the portion of the compressor 110 that approaches the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It is arranged on the edge portion 71c side of the inner circumference. That is, the portions of the chip seal 83 that approach the subport 62a on the outward surface side of the fixed scroll 60 and the subport 62b on the inward surface side of the fixed scroll 60 are separated from the subport 62 with respect to the center 71a of the swing spiral wrap portion 71, respectively. It is located on the side. Therefore, the compressor 110 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 83 is configured in one involute shape and arranged at the center 71a of the swing spiral wrap portion 71, and the subport 62 The diameter can be designed large.

Specifically, when the tip seal 83 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the sub port 62 is set to "(wrap portion). Width / 2) + (chip seal width / 2) ”must be the constraint value or less. On the other hand, in the compressor 110, since the chip seal 83 is integrally formed by connecting the two curved portions of the first curved portion 83a and the second curved portion 83b, the subport exceeds this constraint value. It is possible to increase the diameter of 62.

Further, the injection port 63 can be similarly designed to be large for the compressor 110 provided with the injection port 63 instead of the sub port 62. The compressor 110 is arranged so that the injection port 63a of the chip seal 83 and the portion approaching the injection port 63b are located on the side away from the injection port 63 with respect to the center 71a of the oscillating spiral wrap portion 71, respectively. Therefore, the compressor 110 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 83 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the injection port 63. Can be designed with a large diameter.

Specifically, when the tip seal 83 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the injection port 63 is set to "(wrap). The constraint value must be less than or equal to "part width / 2) + (chip seal width / 2)". In the compressor 110, since the chip seal 83 is integrally formed by connecting the two curved portions of the first curved portion 83a and the second curved portion 83b having the above configuration, the injection is more than this constraint value. The diameter of the port 63 can be increased.

As a result, the resistance of the compressor 110 when the working gas is discharged from the sub port 62 is reduced, and the performance can be improved. Further, in the compressor 110, when the injection port 63 is formed instead of the sub port 62, the flow rate of the working fluid of the liquid phase to be injected increases, and the discharge temperature can be lowered more efficiently.

Further, for example, if a notch is provided in the chip seal as in the prior art, gas leaks from the notch to the adjacent compression chambers, which may greatly reduce the performance of the compressor. Further, stress concentration in the notch of the chip seal may reduce the strength of the chip seal. In the compressor 110, the chip seal 83 is arranged at a position away from the sub port 62 or the injection port 63, and the chip seal 83 is not provided with a notch. Therefore, in the compressor 110, gas leakage does not occur between the compression chambers, and the strength of the chip seal 83 does not decrease due to stress concentration.

Further, in the compressor 110, the chip seal 83 is integrally formed by connecting the two curved portions of the first curved portion 83a and the second curved portion 83b having the above configuration. In the compressor 110, when the tip seal 80 of the fixed scroll 60 is formed by an involute curve as in the conventional case and is arranged at the center 71a of the tip surface of the fixed spiral wrap portion 61, the tip seal 80 of the fixed scroll 60 and the swing scroll 70 The shape of the chip seal 83 is different. Therefore, the compressor 110 can prevent the tip seal 83 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 from being erroneously assembled alternately.

Further, since the chip seal 83 of the compressor 110 smoothly connects a plurality of curves to each other, it is possible to process the fitting groove of the chip seal 83 at once in the swing scroll 70 with a single stroke, which is excellent processing. Sex can be ensured.

Further, the compressor 110 can reduce the number of curves constituting the chip seal 83 as compared with the compressor 100 according to the first embodiment. Therefore, when the compressor 110 processes the fitting groove of the tip seal 83 on the tip surface of the swinging spiral wrap portion 71, the number of boundaries forming the groove is reduced, and the fitting groove of the tip seal 83 is reduced at this boundary. Processing defects such as a step are less likely to occur.

Embodiment 3.
FIG. 8 is an axial sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 84 in the compressor 120 according to the third embodiment of the present invention. Parts having the same configuration as the compressor 100 and the compressor 110 of FIGS. 1 to 7 are designated by the same reference numerals, and the description thereof will be omitted. In the compressor 120, the configuration of the chip seal 84 is different only in the configuration of the chip seal 82 of the compressor 100, and the other configurations constituting the compressor 120 are the same as those of the compressor 100.

A tip seal fitting groove 81 having the same shape as the tip seal 84 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 84 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 84 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll 60. Further, the tip seal 84 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 84 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 120, so that the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 84 slides while being pressed against the swinging spiral base plate portion 74 during the operation of the compressor 120, thereby fixing the gap between the fixed spiral lapping portion 61 and the swinging spiral base plate portion 74. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 or the injection port 63 is provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and approaches the tip seal 84 provided on the lap tip surface of the rocking scroll 70. In order to ensure the sealing property of the chip seal 84, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 84.

As shown in FIG. 8, in the compressor 120, the chip seal 84 is composed of a plurality of curves having different curvatures, and the first curve portion 84a, the second curve portion 84b, and the third curve portion 84c are included. , A fourth curved portion 84d and a fifth curved portion 84e. In the compressor 120, as shown in FIG. 8, the chip seal 84 has a first curved portion 84a, a second curved portion 84b, a third curved portion 84c, a fourth curved portion 84d, and a fifth curved portion 84e. It is integrally composed by connecting the five curved parts of. In FIG. 8, the chip seal 84 is shown so as to have a break in order to clearly indicate the boundary between the curves, but the boundary between the five curves is not divided, and the chip seal 84 is an integral piece without a break. is there. That is, in the chip seal 84, a plurality of curves having different curvatures are continuously formed.

The tip seal 84 has a first curved portion 84a in which a portion of the fixed scroll 60 that approaches the subport 62a on the outward surface side passes through the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Has. Alternatively, in the chip seal 84, the portion of the fixed scroll 60 that approaches the injection port 63a on the outward surface side passes through the outer peripheral edge portion 71b side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has a curved portion 84a. The first curved portion 84a is composed of, for example, an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The tip seal 84 has a second curved portion in which a portion of the fixed scroll 60 that approaches the subport 62b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has 84b. Alternatively, in the tip seal 84, a portion of the fixed scroll 60 that approaches the injection port 63b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has two curved portions 84b. The second curved portion 84b is composed of, for example, an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The boundary between the first curved portion 84a and the second curved portion 84b is connected by a third curved portion 84c formed into a smooth curve , for example, an involute curve having a radius of curvature larger than that of the swing scroll 70. The fourth curved portion 84d of the tip seal 84 smoothly connects the ends of the first curved portion 84a and the fifth curved portion 84e, which are adjacent curves, by using an involute curve having a pitch smaller than that of the swing scroll 70. There is. The fifth curved portion 84e of the tip seal 84 is formed by an involute curve passing through the center of the swinging spiral wrap portion 71.

In the compressor 120 according to the third embodiment, the chip seal 84 is composed of five curved portions, but the number of curved portions constituting the chip seal 84 is changed according to the number of subports 62 or injection ports 63. Needless to say, that is good. The shape of the tip seal 84 of the fixed scroll 60 is formed by an involute curve having the same curvature as the fixed spiral wrap portion 61 of the fixed scroll 60 as before, and the center 71a in the width direction of the fixed spiral wrap portion 61 of the fixed scroll 60. It may be arranged in.

As described above, in the chip seal 84 of the compressor 120, the portion approaching the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It is arranged on the edge portion 71c side of the inner circumference. That is, the portions of the chip seal 84 that approach the subport 62a on the outward surface side of the fixed scroll 60 and the subport 62b on the inward surface side of the fixed scroll 60 are separated from the subport 62 with respect to the center 71a of the swing spiral wrap portion 71, respectively. It is located on the side. Therefore, the compressor 120 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 84 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the subport 62 The diameter can be designed large.

Specifically, when the tip seal 84 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the sub port 62 is set to "(wrap portion). Width / 2) + (chip seal width / 2) ”must be the constraint value or less. On the other hand, in the compressor 120, the chip seal 84 has five, a first curved portion 84a, a second curved portion 84b, a third curved portion 84c, a fourth curved portion 84d, and a fifth curved portion 84e. The curved parts are joined together to form an integral unit. Therefore, the compressor 120 can increase the diameter of the sub port 62 beyond this constraint value.

Further, the injection port 63 can be similarly designed to be large for the compressor 120 in which the injection port 63 is provided instead of the sub port 62. The compressor 120 is arranged so that the injection port 63a of the chip seal 84 and the portion approaching the injection port 63b are located on the side away from the injection port 63 with respect to the center 71a of the oscillating spiral wrap portion 71, respectively. Therefore, the compressor 120 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 84 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the injection port 63. Can be designed with a large diameter.

Specifically, when the tip seal 84 is arranged at the center 71a of the tip surface of the swinging spiral wrap portion 71 as in the conventional case, the diameter of the injection port 63 is set to "(wrap) in order to satisfy the seal width δ> 0. The constraint value must be less than or equal to "part width / 2) + (chip seal width / 2)". In the compressor 120, the chip seal 84 has five curved portions 84a, a second curved portion 84b, a third curved portion 84c, a fourth curved portion 84d, and a fifth curved portion 84e having the above configuration. The curved parts are joined together to form an integral unit. Therefore, the compressor 120 can increase the diameter of the injection port 63 beyond this constraint value.

As a result, the resistance of the compressor 120 when the working gas is discharged from the sub port 62 is reduced, and the performance can be improved. Further, in the compressor 120, when the injection port 63 is formed instead of the sub port 62, the flow rate of the working fluid of the liquid phase to be injected increases, and the discharge temperature can be lowered more efficiently.

Further, for example, if a notch is provided in the chip seal as in the prior art, gas leaks from the notch to the adjacent compression chambers, which may greatly reduce the performance of the compressor. Further, stress concentration in the notch of the chip seal may reduce the strength of the chip seal. In the compressor 120, the chip seal 84 is arranged at a position away from the sub port 62 or the injection port 63, and the chip seal 84 is not provided with a notch. Therefore, in the compressor 120, gas leakage does not occur between the compression chambers, and the strength of the chip seal 84 does not decrease due to stress concentration.

Further, in the compressor 120, the chip seal 84 has the first curved portion 84a, the second curved portion 84b, the third curved portion 84c, the fourth curved portion 84d, and the fifth curved portion 84e having the above configuration. The five curved parts are joined together to form an integral unit. In the compressor 120, when the chip seal 80 of the fixed scroll 60 is formed by an involute curve as in the conventional case and is arranged at the center 71a of the tip surface of the fixed spiral wrap portion 61, the chip seal 80 of the fixed scroll 60 and the swing scroll 70 The shape of the chip seal 84 is different. Therefore, the compressor 120 can prevent the tip seal 84 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 from being erroneously assembled alternately.

Further, since the chip seal 84 of the compressor 120 smoothly connects a plurality of curves to each other, it is possible to process the fitting groove of the chip seal 84 at once in the swing scroll 70 with a single stroke, which is excellent processing. Sex can be ensured.

In general, on the tip surface of the spiral wrap, the portion where the tip seal is not fitted becomes a leakage flow path between adjacent compression chambers. If the tip seal is placed offset from the center of the wrap tip surface, the leakage flow rates inside and outside the tip seal are different, so that pressure imbalance occurs in the two compression chambers at symmetrical positions. Since the force for rotating the spiral is generated by this pressure imbalance, the reliability of the spiral or the old dam ring 41 may be affected. On the other hand, in the chip seal 84, the compressor 120 has a fourth curved portion 84d and a fifth curved portion 84e located outside the spiral portion from the first curved portion 84a approaching the sub port 62a on the outward surface side of the fixed scroll 60. Is arranged at the center 71a of the swinging spiral wrap portion 71. Therefore, in the compressor 120, since the widths of both sides of the fitting groove of the chip seal 84 formed in the swing spiral wrap portion 71 are equal, the leakage amount of the symmetrical compression chamber becomes uniform, and the swing scroll The movement of 70 is stable and high reliability can be obtained.

Embodiment 4.
FIG. 9 is an axial sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 85 in the compressor 130 according to the fourth embodiment of the present invention. Parts having the same configuration as the compressor 100, the compressor 110, and the compressor 120 of FIGS. 1 to 8 are designated by the same reference numerals, and the description thereof will be omitted. In the compressor 130, the configuration of the chip seal 85 is different only in the configuration of the chip seal 82 of the compressor 100, and the other configurations constituting the compressor 130 are the same as those of the compressor 100.

A tip seal fitting groove 81 having the same shape as the tip seal 85 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 85 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 85 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll 60. Further, the tip seal 85 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 85 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 130, so that the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 85 slides while being pressed against the swinging spiral base plate portion 74 during the operation of the compressor 130, thereby fixing the gap between the fixed spiral lapping portion 61 and the swinging spiral base plate portion 74. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 or the injection port 63 is provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and approaches the tip seal 85 provided on the lap tip surface of the rocking scroll 70. In order to ensure the sealing property of the chip seal 85, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 85.

As shown in FIG. 9, the chip seal 85 is composed of a plurality of curves having different curvatures, and is configured to have two curved portions, a first curved portion 85a and a second curved portion 85b. ing. In the tip seal 85, the portion approaching the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the inner peripheral edge portion 71c side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Have been placed. The tip seal 85 is formed with a structure in which the first curved portion 85a and the second curved portion 85b are divided. That is, the chip seal 85 is divided into a plurality of curves having different curvatures. The tip seal 85 may have the first curved portion 85a and the second curved portion 85b overlapping in the spiral curve direction, or may be arranged with a slight gap.

The tip seal 85 has a first curved portion 85a in which a portion of the fixed scroll 60 that approaches the subport 62a on the outward surface side passes through the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Has. Alternatively, in the tip seal 85, the portion of the fixed scroll 60 that approaches the injection port 63a on the outward surface side passes through the outer peripheral edge portion 71b side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has a curved portion 85a. The first curved portion 85a is composed of an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

The tip seal 85 has a second curved portion in which a portion of the fixed scroll 60 that approaches the subport 62b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has 85b. Alternatively, in the tip seal 85, a portion of the fixed scroll 60 that approaches the injection port 63b on the inward surface side passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has two curved portions 85b. The second curved portion 85b is composed of an involute curve having the same curvature as the oscillating spiral wrap portion 71 of the oscillating scroll 70.

In the compressor 130 according to the fourth embodiment, the chip seal 85 is composed of two curved portions, but the number of curved portions constituting the chip seal 85 is changed according to the number of subports 62 or injection ports 63. Needless to say, that is good. The shape of the tip seal 85 of the fixed scroll 60 is formed by an involute curve having the same curvature as the fixed spiral wrap portion 61 of the fixed scroll 60 as before, and the center 71a in the width direction of the fixed spiral wrap portion 61 of the fixed scroll 60. It may be arranged in.

As described above, in the chip seal 85 of the compressor 130, the portion approaching the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It is arranged on the edge portion 71c side of the inner circumference. That is, the portions of the chip seal 85 that approach the subport 62a on the outward surface side of the fixed scroll 60 and the subport 62b on the inward surface side of the fixed scroll 60 are separated from the subport 62 with respect to the center 71a of the swing spiral wrap portion 71, respectively. It is located on the side. Therefore, the compressor 130 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 85 is configured in one involute shape and arranged at the center 71a of the swing spiral wrap portion 71, and the subport 62 The diameter can be designed large.

Specifically, when the tip seal 85 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the sub port 62 is set to "(wrap portion). Width / 2) + (chip seal width / 2) ”must be the constraint value or less. On the other hand, in the compressor 130, the chip seal 85 is configured to have two curved portions, a first curved portion 85a and a second curved portion 85b. Therefore, the compressor 130 can increase the diameter of the sub port 62 beyond this constraint value.

Further, the injection port 63 can be similarly designed to be large for the compressor 130 in which the injection port 63 is provided instead of the sub port 62. The compressor 130 is arranged so that the injection port 63a of the chip seal 85 and the portion approaching the injection port 63b are located on the side away from the injection port 63 with respect to the center 71a of the oscillating spiral wrap portion 71, respectively. Therefore, the compressor 130 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 85 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the injection port 63. Can be designed with a large diameter.

Specifically, when the tip seal 85 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, the diameter of the injection port 63 is set to "(wrap) in order to satisfy the seal width δ> 0. The constraint value must be less than or equal to "part width / 2) + (chip seal width / 2)". The compressor 130 is configured such that the chip seal 85 has two curved portions, a first curved portion 85a having the above configuration and a second curved portion 85b. Therefore, the compressor 130 can increase the diameter of the injection port 63 beyond this constraint value.

As a result, the resistance of the compressor 130 when the working gas is discharged from the sub port 62 is reduced, and the performance can be improved. Further, in the compressor 130, when the injection port 63 is formed instead of the sub port 62, the flow rate of the working fluid of the liquid phase to be injected increases, and the discharge temperature can be lowered more efficiently.

Further, for example, if a notch is provided in the chip seal as in the prior art, gas leaks from the notch to the adjacent compression chambers, which may greatly reduce the performance of the compressor. Further, stress concentration in the notch of the chip seal may reduce the strength of the chip seal. In the compressor 130, the chip seal 85 is arranged at a position away from the sub port 62 or the injection port 63, and the chip seal 85 is not provided with a notch. Therefore, in the compressor 130, gas leakage does not occur between the compression chambers, and the strength of the chip seal 85 does not decrease due to stress concentration.

Further, the compressor 130 is configured such that the chip seal 85 has two curved portions, a first curved portion 85a having the above configuration and a second curved portion 85b. In the compressor 130, when the tip seal 80 of the fixed scroll 60 is formed by an involute curve as in the conventional case and is arranged at the center 71a of the tip surface of the fixed spiral wrap portion 61, the tip seal 80 of the fixed scroll 60 and the swing scroll 70 The shape of the chip seal 85 is different. Therefore, the compressor 130 can prevent the tip seal 85 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 from being erroneously assembled alternately.

According to the compressor 130 according to the fourth embodiment, since there is no joint of different curves in the fitting groove of the tip seal 85 provided in the swing spiral wrap portion 71, the processing is easy. Therefore, the compressor 130 does not cause a manufacturing defect such as a step at the boundary of the curve of the fitting groove of the chip seal 85. Further, the compressor 130 can easily manufacture a mold for the chip seal 85.

Embodiment 5.
FIG. 10 is an axial sectional view showing the shapes of the swing scroll 70, the fixed scroll 60, and the tip seal 86 in the compressor 140 according to the fifth embodiment of the present invention. Parts having the same configuration as the compressor 100, the compressor 110, the compressor 120, and the compressor 130 of FIGS. 1 to 9 are designated by the same reference numerals, and the description thereof will be omitted. In the compressor 140, the configuration of the chip seal 86 is different only in the configuration of the chip seal 82 of the compressor 100, and the other configurations constituting the compressor 140 are the same as those of the compressor 100.

A tip seal fitting groove 81 having the same shape as the tip seal 86 is formed on the lap tip surfaces of the fixed scroll 60 and the swing scroll 70, and the tip seal 86 is fitted in the tip seal fitting groove 81. Has been done. The tip seal 86 of the oscillating scroll 70 is arranged at the tip of the oscillating spiral wrap portion 71 along the spiral direction, and is in contact with the fixed spiral base plate portion 64 of the fixed scroll 60 facing the oscillating scroll 60. Further, the tip seal 86 (not shown) of the fixed scroll 60 is arranged at the tip of the fixed spiral wrap portion 61 along the spiral direction and comes into contact with the swing spiral base plate portion 74 of the facing swing scroll 70. The chip seal 86 slides while being pressed against the fixed spiral base plate portion 64 during the operation of the compressor 140, whereby the gap between the swing spiral wrap portion 71 and the fixed spiral base plate portion 64 and the fixed spiral wrap portion 64 are formed. The gap between 61 and the swinging spiral wrap portion 71 is filled to prevent leakage of working gas. Alternatively, the chip seal 86 slides while being pressed against the swinging spiral base plate portion 74 during the operation of the compressor 140, thereby fixing the gap between the fixed spiral lapping portion 61 and the swinging spiral base plate portion 74. The gap between the spiral wrap portion 61 and the oscillating spiral wrap portion 71 is filled to prevent leakage of working gas. The sub port 62 or the injection port 63 is provided on the fixed spiral base plate portion 64 of the fixed scroll 60, and approaches the tip seal 86 provided on the lap tip surface of the rocking scroll 70. In order to ensure the sealing property of the chip seal 86, the diameter of the sub port 62 or the injection port 63 needs to be set within a range that does not completely straddle the chip seal 86.

In the compressor 140, the tip seal 86 of the swing scroll 70 is composed of a plurality of curves having different curvatures, and is configured to have an involute portion 86a and an R portion 86b. In the chip seal 86, a plurality of curves having different curvatures are continuously formed. The R portion 86b of the chip seal 86 is arranged at a position close to the sub port 62 or the injection port 63, and is curved so as to avoid the sub port 62 or the injection port 63 and is formed in an arc shape. The portion of the chip seal 86 other than the R portion 86b is composed of the involute portion 86a. The involute portion 86a is arranged on the lap tip surface of the oscillating scroll 70, passes through the center 71a in the width direction of the oscillating spiral wrap portion 71, and is formed by an involute curve having the same curvature as the oscillating spiral wrap portion 71. The width of the R portion 86b is the same as the width of the involute portion 86a, but may be different.

The tip seal 86 has an R portion 86b1 in which a portion of the fixed scroll 60 approaching the subport 62a on the outward surface side passes through the outer peripheral edge portion 71b side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. .. Alternatively, the tip seal 86 has an R portion in which a portion of the fixed scroll 60 that approaches the injection port 63a on the outward surface side passes through the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has 86b1.

The tip seal 86 has an R portion 86b2 in which a portion approaching the sub port 62b on the inward surface side of the fixed scroll 60 passes through the end edge portion 71c side of the inner circumference with respect to the center 71a in the width direction of the swing spiral wrap portion 71. Have. Alternatively, in the chip seal 86, a portion of the fixed scroll 60 that approaches the injection port 63b on the inward surface side passes through the inner peripheral edge portion 71c side with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It has a part 86b2.

In the compressor 140 according to the fifth embodiment, the chip seal 86 has two R portions 86b, but the number of R portions 86b constituting the chip seal 86 according to the number of subports 62 or injection ports 63. Needless to say, it is good to change. The shape of the tip seal 86 of the fixed scroll 60 is formed by an involute curve having the same curvature as the fixed spiral wrap portion 61 of the fixed scroll 60 as before, and the center 71a in the width direction of the fixed spiral wrap portion 61 of the fixed scroll 60. It may be arranged in.

As described above, in the chip seal 86 of the compressor 140, the portion of the compressor 140 that approaches the sub port 62 or the injection port 63 is located on the outer peripheral edge portion 71b side and the outer peripheral edge portion 71b with respect to the center 71a in the width direction of the swing spiral wrap portion 71. It is arranged on the edge portion 71c side of the inner circumference. That is, the portions of the chip seal 86 that approach the subport 62a on the outward surface side of the fixed scroll 60 and the subport 62b on the inward surface side of the fixed scroll 60 are separated from the subport 62 with respect to the center 71a of the swing spiral wrap portion 71, respectively. It is located on the side. Therefore, the compressor 140 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 86 is configured in one involute shape and is arranged at the center 71a of the swing spiral wrap portion 71, and the subport 62. The diameter can be designed large.

Specifically, when the tip seal 86 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the sub port 62 is set to "(wrap portion). Width / 2) + (chip seal width / 2) ”must be the constraint value or less. On the other hand, the compressor 140 is configured such that the chip seal 86 has an R portion 86b formed in an arc shape by being curved so as to avoid the sub port 62 or the injection port 63, and an involute portion 86a. .. Therefore, the compressor 140 can increase the diameter of the sub port 62 beyond this constraint value.

Further, the injection port 63 can be similarly designed to be large for the compressor 140 in which the injection port 63 is provided instead of the sub port 62. The compressor 140 is arranged so that the injection port 63a of the chip seal 86 and the portion approaching the injection port 63b are located on the side away from the injection port 63 with respect to the center 71a of the oscillating spiral wrap portion 71, respectively. Therefore, the compressor 140 can secure a large seal width δ and can secure a large seal width δ as compared with the case where the chip seal 86 is configured in one involute shape and arranged at the center 71a of the swing spiral wrap portion 71, and the injection port 63. Can be designed with a large diameter.

Specifically, when the tip seal 86 is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 as in the conventional case, in order to satisfy the seal width δ> 0, the diameter of the injection port 63 is set to "(wrap). The constraint value must be less than or equal to "part width / 2) + (chip seal width / 2)". The compressor 140 includes a chip seal 86 having an R portion 86b formed in an arc shape by being curved so as to avoid the sub port 62 or the injection port 63, and an involute portion 86a. Therefore, the compressor 140 can increase the diameter of the injection port 63 beyond this constraint value.

As a result, the resistance of the compressor 140 when the working gas is discharged from the sub port 62 is reduced, and the performance can be improved. Further, in the compressor 140, when the injection port 63 is formed instead of the sub port 62, the flow rate of the working fluid of the liquid phase to be injected increases, and the discharge temperature can be lowered more efficiently.

Further, for example, if a notch is provided in the chip seal as in the prior art, gas leaks from the notch to the adjacent compression chambers, which may greatly reduce the performance of the compressor. Further, stress concentration in the notch of the chip seal may reduce the strength of the chip seal. In the compressor 140, the chip seal 86 is arranged at a position away from the sub port 62 or the injection port 63, and the chip seal 86 is not provided with a notch. Therefore, in the compressor 140, gas leakage does not occur between the compression chambers, and the strength of the chip seal 86 does not decrease due to stress concentration.

Further, the compressor 140 includes a chip seal 86 having an R portion 86b formed in an arc shape by being curved so as to avoid the sub port 62 or the injection port 63, and an involute portion 86a. In the compressor 140, when the chip seal 80 of the fixed scroll 60 is formed by an involute curve as in the conventional case and is arranged at the center 71a of the tip surface of the fixed spiral wrap portion 61, the chip seal 80 of the fixed scroll 60 and the swing scroll 70 The shape of the chip seal 86 is different. Therefore, the compressor 140 can prevent the tip seal 86 of the swing scroll 70 and the tip seal 80 of the fixed scroll 60 from being erroneously assembled alternately.

Further, the compressor 140 has an R portion 86b that is curved so as to avoid the sub port 62 or the injection port 63 and is formed in an arc shape. Therefore, the compressor 140 can arrange the tip seal 86 away from the subport 62 or the injection port 63 only in the minimum range close to the subport 62 or the injection port 63. In the compressor 140, the involute portion 86a is arranged at the center 71a of the tip surface of the swing spiral wrap portion 71 except for the R portion 86b. Therefore, in the compressor 140, the imbalance in the amount of leakage between the inside and the outside of the chip seal 86 is minimized, and the imbalance in the pressure of the compression chamber at the symmetrical position is also suppressed to be small, so that high reliability is obtained. Be done.

The present invention is not limited to the above embodiment and can be modified in various ways. For example, although the above embodiment illustrates the case where the compressor 100 is a low pressure shell type, the compressor 100 may be a high pressure shell type.

20 shell, 20a lower shell, 20b central shell, 20c upper shell, 21 oil sump, 23 oil pump, 24 oil drain pipe, 25 frame, 25a suction port, 26 subframe, 27 suction pipe, 28 discharge pipe, 29 muffler, 30 Motor, 31 rotor, 32 stator, 40 compression part, 40a compression chamber, 40b compression chamber, 41 oldam ring, 41a oldam groove, 42 slider, 43 swing bearing, 44 sleeve, 45 low pressure chamber, 46 high pressure chamber, 50 shaft part , 50a refueling path, 52 first balancer, 52a balancer cover, 53 second balancer, 54 main bearing, 55 auxiliary bearing, 60 fixed scroll, 61 fixed spiral wrap, 62 subport, 62a subport, 62b subport, 63 injection Port, 63a injection port, 63b injection port, 64 fixed swirl base plate, 65 discharge port, 70 swing scroll, 71 swing swirl wrap, 71a center, 71b edge, 71c edge, 74 swing swirl Base plate part, 80 chip seal, 81 chip seal fitting groove, 82 chip seal, 82a first curved part, 82b second curved part, 82c third curved part, 83 chip seal, 83a first curved part, 83b second Curved part, 84 chip seal, 84a 1st curved part, 84b 2nd curved part, 84c 3rd curved part, 84d 4th curved part, 84e 5th curved part, 85 chip seal, 85a 1st curved part, 85b 2nd Curved part, 86 chip seal, 86a Involute part, 86b R part, 86b1 R part, 86b2 R part, 100 pumps, 110 compressors, 120 compressors, 130 compressors, 140 compressors.

Claims (10)

A fixed scroll having a fixed spiral base plate portion and a fixed spiral wrap portion formed on the fixed spiral base plate portion, and
An oscillating scroll having a oscillating spiral base plate portion and a oscillating spiral wrap portion formed on the oscillating spiral base plate portion, and a oscillating scroll.
Have,
The fixed scroll is formed with at least one subport for discharging the working gas or at least one injection port for injecting the working fluid of the liquid phase.
The swing scroll
A tip seal is provided at the tip of the swinging spiral wrap portion, which is arranged along the spiral direction and is in contact with the fixed spiral base plate portion of the fixed scroll facing the swinging spiral wrap portion.
The chip seal is
A portion close to the sub port or the injection port is arranged on the edge portion side with respect to the center in the width direction of the swinging spiral wrap portion.
A portion of the subport or a portion approaching the injection port is a first curved portion that passes through the edge portion of the outer circumference with respect to the center in the width direction of the swinging spiral wrap portion.
A second curved portion that passes through the end edge portion of the inner circumference with respect to the center in the width direction of the swinging spiral wrap portion and a portion that approaches the subport or the injection port.
Have a,
The second curved portion is a compressor formed by an involute curve having the same curvature as the swinging spiral wrap portion. A fixed scroll having a fixed spiral base plate portion and a fixed spiral wrap portion formed on the fixed spiral base plate portion, and
A swing scroll provided with a swing spiral base plate portion and a swing spiral wrap portion formed on the swing spiral base plate portion, and
Have,
The fixed scroll is formed with at least one subport for discharging the working gas or at least one injection port for injecting the working fluid of the liquid phase.
The swing scroll
A tip seal is provided at the tip of the oscillating spiral wrap portion, which is arranged along the spiral direction and is in contact with the fixed spiral base plate portion of the fixed scroll facing the oscillating spiral wrap portion.
The chip seal is
A portion close to the sub port or the injection port is arranged on the edge portion side with respect to the center in the width direction of the swinging spiral wrap portion.
A portion of the subport or a portion approaching the injection port is a first curved portion that passes through the edge portion of the outer circumference with respect to the center in the width direction of the swinging spiral wrap portion.
A second curved portion that passes through the end edge portion of the inner circumference with respect to the center in the width direction of the swinging spiral wrap portion and a portion that approaches the subport or the injection port.
Have,
The second curved portion is a compressor formed by an involute curve having a radius of curvature larger than that of the swinging spiral wrap portion. The compressor according to claim 1 or 2 , wherein the chip seal is composed of a plurality of curves having different curvatures. The compressor according to claim 3 , wherein the chip seal is formed by continuously forming a plurality of curves having different curvatures. The compressor according to claim 3 , wherein the chip seal is divided into a plurality of curves having different curvatures. The compressor according to any one of claims 1 to 5 , wherein the first curved portion is formed by an involute curve having the same curvature as the swinging spiral wrap portion. The chip seal is
The compressor according to any one of claims 1 to 6 , further comprising a third curved portion formed by an involute curve having a radius of curvature larger than that of the swinging spiral wrap portion. The chip seal is
The compressor according to claim 7 , further comprising a fourth curved portion formed by an involute curve having a radius of curvature smaller than that of the swinging spiral wrap portion. The chip seal is
The compressor according to claim 8 , further comprising a fifth curved portion passing through the center in the width direction of the swinging spiral wrap portion. The fixed scroll
A tip seal is provided at the tip of the fixed spiral wrap portion, which is arranged along the spiral direction and is in contact with the swing spiral base plate portion of the swing scroll facing the fixed spiral wrap portion.
The chip seal of the fixed scroll is formed by an involute curve having the same curvature as the fixed spiral wrap portion of the fixed scroll, and is centrally arranged in the width direction of the fixed spiral wrap portion of the fixed scroll. The compressor according to any one of 9.

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